CVE Watch19 oct 2026

CVE-2026-53209

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend E

CVSS

7.8

Alto

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 25 jun 2026 · Última mod.: 19 oct 2026 · CWE-787 · CWE-122

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-09-282026-10-25

Descripción técnica

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend Existing advertising instances can already hold the maximum extended advertising payload. When hci_adv_bcast_annoucement() prepends the Broadcast Announcement service data to that payload, the combined data may no longer fit in the temporary buffer used to rebuild the advertising data. Reject that case before copying the existing payload and report the failure through the device log. This keeps the existing advertising data intact and avoids overrunning the temporary buffer.

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